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将脉冲磁场和稳恒磁场组成复合磁场作用于Mg93Zn6Y1合金的凝固过程,分析复合磁场对合金凝固组织和力学性能的影响.结果表明,相比单一磁场,经复合磁场处理后合金的凝固组织细化更为显著,初生相的形貌转变为蔷薇状和多边形状共存,平均晶粒尺寸仅为146 μm;第二相的形貌转变为不连续网状,其分布也更为均匀和弥散.经复合磁场处理后,合金表现出理想的综合力学性能,其室温下的屈服强度、抗拉强度和伸长率分别达到172 MPa、231 MPa和3.39％,相比未处理合金提高了73.4％、68.6％和63.1％.“,”Effects of compound magnetic field (CMF) coupled with steady magnetic field (SMF) and pulsed magnetic field (PMF) on microstructure and mechanical properties of the Mg93Zn6Y1 alloy were investigated.The results show that the microstructure of alloy is refined remarkably with CMF treatment compared with that of ones with SMF treatment or with PMF treatment,respectively.The primary α-Mg in the alloy treated by CMF is transformed from fully developed dendrites with the average grain size of 1 180 μm to rosette-like and polyhedral morphology with the average grain size of 146 μm.Moreover,the second phase is changed into discontinuous fine reticular morphology with more homogeneous and dispersed distribution.The alloy treated by CMF exhibits the desirable mechanical properties,where yield strength,ultimate tensile strength and elongation at room temperature reach 172 MPa,231 MPa and 3.39％,which are increased by 73.4％,68.6％ and 63.1％,respectively,compared with those of the untreated alloy.